@files=("zzz.21.yy.ccc", "zzz.220.ccc" );

foreach $name (@files)
  {
  chomp $name;
    $match="no ";
    $match="yes" if ( $name =~ /(^[a-z]{3})\.(\d{2,3})\..*\.ccc/) ;
    print "$match, $name, match1: $1, match2: $2\n";
  }

##</code><code>##

perl issueWithRegex.pl 
yes, zzz.21.yy.ccc, match1: zzz, match2: 21
no , zzz.220.ccc, match1: zzz, match2: 21.

##</code><code>##

perl issueWithRegex.pl
yes, zzz.21.yy.ccc, match1: zzz, match2: 21
no , zzz.220.ccc, match1: zzz, match2: 21